18ct white gold 109ct tanzanite 028ct diamond twist ring rw929tz the tanzanite collection by tivon showcases one of the worlds most desired stones that is considered a thousand times rarer than the diamond this seductive gemstone can exhibit a variety of surreal colours including blues violets and burgundies so each piece is truly unique and beautiful this strikingly elegant ring boasts two pear shaped 109ct tanzanite stones set onto a beautifully contrasting 18ct white gold band surroun